Method and instrument for detecting aggregate relative density and water absorbing rate

Abstract

The invention relates to a test method of aggregate apparent relative density water absorption and apparatus. The method mainly includes: using vacuum method to reduce aggregate saturation period; using alcohol concentrate soundex to confirm saturate face dry point; using ultrasound fluid place method to compute aggregate volume. The show character of apparatus and system are composed of three part of machine body structure, sensor measurement and electronic control data processing system and accessory equipment. Its key steps includes: (a) putting the aggregate into the oven drying until constant weight, weigh the certain qualitative sample, record the quality; (b) putting the aggregate into the vacuum suction device, add dense alcohol, vacuumize to saturation; (c) with the steadied stirring under the sirocco, the saturation aggregate in the saturation face dry equipment, based on the alcohol dense sensor to judge the saturation face dry state, weigh and record the saturation face dry quality; (d) inject a dosing dense alcohol which is known density, measure the alcohol liquid level position, record the liquid level height data;(e) compute aggregate apparent relative density, bulk volume relative density and water absorption based on the above data; (f) according to the relation between the dense alcohol density and the water density, do the conversion between relative density and water (liquid)absorption, again according to the test temperature, do the temperature correction of the relative density and water absorption. The invention achieves the full automation of measuring the thick, thin aggregate apparent relative density, bulk volume relative density and water absorption; unifies the original measure method of thick, thin two different size aggregate. Effectively eliminates the subjectivity of manual testing method, renders the test better accuracy and repeatability; greatly reduces the time of test and manual intervention.

Description

technical field [0001] The invention relates to a test method and an instrument, which are used for measuring the apparent relative density, gross volume relative density and water absorption of aggregate (stone) materials used in civil engineering such as highways and structural buildings, and petroleum and geological exploration fields. Background technique [0002] The relative density and water absorption of aggregate (stone) materials are two basic parameters to be used in the design and construction of civil engineering fields such as highway and structural construction engineering. These parameters also play an important role in the fields of petroleum and geological exploration. Engineering technicians are very concerned about a method and instrument that can accurately and quickly test the relative density and water absorption of aggregate (stone) materials. The relative density and water absorption of aggregate (stone) materials are important indicators to reflect...

AI Technical Summary

Problems solved by technology

However, none of these methods can be used to simultaneously measure the apparent relative density, bulk relative density and water absorption of aggregates.

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